I am a huge Superman fan and, I think, I've watched and devoured pretty much every film/tv show/almost comic book that depicts the big guy. Thus, needless to say, I absolutely loved James Gunn's Superman film and watched it multiple times when it was in the theater.
With that out of the way, Superman: The Art and Making of the Film from James Field is a strong, if not very solid compendium to the movie. If you adored the movie like I did, there is a lot you will enjoy from this book. However, I must admit that if you were to compare this to other art books about films, it does fall a tad bit short.
Fields does a great job going through each character, location, and tying it to the overall mythology of the character and how the pieces fit in the comics. The interviews are also very well done and depict the creative process and decisions the departments undertook in order to come to the final versions that we saw in the film.
However, where it falls short is actually surprising because even though you do get beautiful spreads of the art in making the film, it doesn't really feel like a lot and the decision for adding many different examples of the process for one location while only giving one to another character seemed a bit odd. Now, I'm going to assume that this is not Fields' fault since I can imagine there are contracts involved and there is a process, but it did leave me disappointed.
Even though I have seen versions of the trunkless Corenswet Superman on the web (and I also want to say on the blu ray) it is no where to be found here. Superman being the main character you would think there would big a very large section reserved for him, showing the various iterations of the costume before we got to the one we got for this film. But you don't. Instead you do get a lot of different depictions of Luthorcorp and for the 4th Dimensional Being that you saw in the background while Supes took off his boots. So there are just odd choices that were focused on, which might lead up to some disappointment.
All in all, a solid compendium to the movie especially if you are a fan. But if you were looking for unexpected little nuggets or interesting iterations of a design, especially on the important components such as Superman, you might be disappointed.